BC cams. They give you the lopey idle that you want and none of the power. I've also heard ill of their valvetrains but can't remember the specifics. I'm not going to say you should have gotten Kelfords simply because the Asian company they have that makes them is having notable reliability issues. I was going to recommend GSCs. 280s are also a bit too aggressive for that turbo. Technically the 272s I have are more suited to 35R setups (bigger than what either of us are running) and they maintain a good idle.